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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e1baabe52b3607f1a19c28f4a183c12424bf59dcd07bc81e0ae38151861aba45' 
  AND token = 'Qk6oCm3/V8x/LSnW3JtInkechYiAM+XES0rUy6zr9uE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}