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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d9f507cfc3fa4e51b5739f4b1e8ebf33a845194b142766792ef5f433a6fbce0' 
  AND token = 'b1V2EI+aBj0WOHKksIG518fAWJaseI9R7bdX1umMHsY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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