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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0098072a0b3ddc7e5e693334683c1df5e4d0e7dd79be584eb06523fe6c6ddd61' 
  AND token = 'yoS/v8ej8kuq2imIIPYNkTouvVr451ULxcl70s1FP3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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