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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c74a7b8eeb8a5b1bee93c15c041caed12955af2df358fa36050717ed1b14d6ab' 
  AND token = 'gBW3RWZ37doXYiu4peNPonNBDVDPr7Il3Qa1fR9HMDk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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